Pesticide factory pollution remediation method based on mountain and hill site conditions

Abstract

The invention discloses a pesticide factory pollution remediation method based on mountain and hill site conditions. The method comprises the following steps: S1, preparing an organic fertilizer; s2, preparing an alkaline material; s3, preparation of a composition: mixing the organic fertilizer obtained in the step S1 with the first alkaline material and the second alkaline material obtained in the step S2 according to a mass ratio of (1-2): (1-5): (0.5-2), and stirring to react for 0.5-1 hour to obtain the composition; s4, construction of a permeation tube assembly; and S5, constructing the permeable reactive barrier. According to the invention, specific types of alkaline materials and organic fertilizers are combined and applied to the soil seriously polluted by pesticides, the composition can effectively promote the conversion of ammonia nitrogen in the soil, improve the pH value of the soil and realize the passivation of heavy metals, and also has a good removal effect on organic pesticide pollution, and through the construction of the permeation tube assembly and the permeable reactive barrier, the soil pollution can be effectively removed. And the utilization efficiency of the composition under the condition of large-topographic-relief sites in mountainous and hilly areas is improved, and a more effective repairing effect is achieved.

Description

technical field [0001] The invention relates to the technical field of pesticide-contaminated soil treatment, in particular to a method for remediating pesticide factory-contaminated sites based on large terrain fluctuations in mountainous and hilly areas. Background technique [0002] A large amount of pesticides are produced in my country every year, especially in the Yangtze River Delta region, which is the main production area of ​​pesticides in my country. Pesticide production process will produce a large amount of waste residue and waste water. If it is discharged into the soil due to poor management, it will cause soil pollution. As a result, the Yangtze River Delta region has been harmed by pesticide pollution all year round. The complex pollution components, coastal rivers and its unique geomorphic and hydrological conditions have made it difficult to control, seriously threatening human health and environmental safety. It has become a major soil environmental proble...

AI Technical Summary

Problems solved by technology

As a result, the Yangtze River Delta region has been harmed by pesticide pollution all year round. The complex pollution components, coastal rivers and its unique geomorphic and hydrological conditions have made it difficult to control, seriously threatening human health and environmental safety. It has become a major soil environmental problem that needs to be solved urgently.

[0003]The Yangtze River Delta region has a variety of landform types, generally dominated by plains, but there are also a large proportion of mountainous and hilly landforms. For example, the area of ​​mountainous and hilly landforms in Zhejiang Province accounts for about 70.4% of the area, about 40% in Anhui Province, and about 15% in Jiangsu Province. The shallow soil layers in these mountainous and hilly areas are mainly composed of gravel and silty clay, with a content of gravel as high as 40% to 50%, and good permeability. , the pollution diffuses quickly; the bedrock rock surface in mountainous and hilly areas has large fluctuations, and the buried depth is relatively shallow or the bedrock is directly exposed; the terrain of the site has large fluctuations, and there may be large areas of filling and excavation, and there will be karst caves in some areas, which will increase pollution. The complexity of infiltration, migration and diffusion also increases the difficulty and cost of investigation and evaluation, restoration and treatment construction

Images